Registering a trademark in Thailand is a notoriously rigorous process, particularly for international brands. Unlike many jurisdictions that follow a more lenient “suggestive” standard, the Thai Department of Intellectual Property (DIP) adheres strictly to the letter of the Trademark Act B.E. 2534 (1991). Statistics show that for international registrations via the Madrid Protocol, over 85% of applications encounter provisional refusals, often due to specific local requirements regarding distinctiveness and goods descriptions. Below is an analysis of the common pitfalls and the strategic evidence needed to overcome them.

Under Section 7(2)(2), any mark that directly refers to the geographical origin of the goods is deemed non-distinctive. The Thai Registrar maintains a highly conservative list of “prohibited geographical names,” which includes not just countries and cities, but also well-known rivers, mountains, and even famous roads.

In past rulings, marks such as “MOZAMBIQUE GAS” (Class 4) and “JAPAN” (Class 17) were refused because they identified the origin or a location known for the resource. Even if the applicant is not from that country—such as a Thai national using “GERMANY” for cutlery—the mark will be rejected to prevent public confusion regarding origin.

Under the 2022 Trademark Examination Guidelines, an applicant can overcome this by proving the mark has been used in Thailand for at least two years. A notable 2024 court victory for the mark “WEPLAY” demonstrated that while the Registrar may find a word descriptive, the Intellectual Property and International Trade (IP&IT) Court is more willing to accept evidence of long-term use (10+ years) and high marketing spend as proof of “acquired distinctiveness.”

Thailand’s Section 8(6) and (11) are among the strictest in Asia. They prohibit any mark that contains or resembles the national flag, royal arms, or emblems of Thailand or any foreign state.

Many modern logos use minimalist stripes or color palettes that the Registrar may interpret as “resembling” a foreign flag. Unlike other grounds, this is often a “hard refusal.”

The Supreme Court (Decision No. 9971/2558) regarding “SINGAPOREAIR” highlighted the complexities of using country names and abbreviations. Brand owners must often secure written permission from the foreign state’s competent authority—a process that is practically impossible for most private enterprises. The most viable strategy is the removal or significant stylization of these elements before filing.

Vague goods descriptions are the leading cause of refusal for Madrid Protocol applications. While the Nice Classification is the international standard, the Thai DIP requires far more specificity.

Applicants must specify the exact items, such as “shirts,” “luggage,” “handbags,” or “lipsticks.” Utilizing the DIP’s pre-approved “Manual of Goods and Services” can fast-track applications and reduce the risk of office actions by nearly 90%.

Section 20(2) prohibits marks that are “confusingly similar” to prior registrations. Thai examiners look at visual, phonetic, and even “transliterated” similarities.

In the case of “KIRIN” vs. “KIRAINE,” the court examined not just the spelling, but how the words sounded when pronounced in Thai. However, the Supreme Court (Decision No. 3686/2551) later clarified that if the distribution channels are distinct—for example, one is a prescription drug and the other a traditional over-the-counter medicine—the marks may coexist because the “target audience” (doctors vs. general consumers) is different.

Conducting a “transliteration search” (checking how your brand sounds when written in the Thai script) is essential for foreign brands to identify hidden conflicts.

When an application is hit with multiple grounds for refusal—such as a lack of distinctiveness combined with a similarity objection—the administrative appeal process can last 2 to 3 years with a low success rate at the Trademark Board level.